Sectional refrigerant compressor



Dec. 14, 1937.

E. J. SAiLSTAD 2,101,956

7 SECTIONAL REFRIGERANT COMPRESSOR Filed Jan. 22, 1934 5 Sheets-Sheet 1.

40 40 Emmwmmm Dec; 14, 1937. E. J. SAILSTAD 2,101,956

SECTIONAL REFRIGERANT GOMPRES SOR Filed Jan. 22', 1934 s Sheets-Sheet 2 ,1 E J. SAILSTAD 2,101,956

SECTIONAL REFRIGERANT COMPRESSOR Filed Jan. 22, 1934 a Sheets-Sheet 3 Patented 14, 1937 tr stares PATENT OFFICE- to Van Dayna-Moran Fixtures a corporation of Minneso s s or 20., St. Paul,

Application January, 1934, Serial No. roam 20laims.

This invention relates to a sectional refrigerant compressor and cooling manifold having means whereby compressor units or sections may be as sociated together to increase the capacity of the refrigerating compressor to the desired size. This may be accomplished in a simple and effective manner and provides an economical means of making a sectional compressor which may be offered to the trade with the advantage that it may be expanded to take care of a larger refrigerating capacity whenever it is desired, by adding sectional units thereto.

Heretofore refrigerant compressors have been made of a definite unit size with possibly one or more compressing cylinders conected together to make up the entire unit. In these older constructions, it was not possible to offer to the trade a sectional refrigerant compressor which could be enlarged at any time, if desired, without replacing the entire refrigerant compressor with an entirely new and complete compressing unit and associated parts. I have overcome this by providing a compressor made up of one or more compressor units wherein these sections or units are provided, which include individual compressing cylinders and connecting crank cases which are of a uniform design and construction that may be connected together with as many sections as may be desired. Thus a refrigerant compressor may be made with my construction, having a single compressing cylinder. Whenever it is desired, one or more compressor units may be added to the same to increase the capacity of the entire compressor assembly. I

In adding a cylinder I change the crank shaft commensurateto the number of cylinders, so that whenever a cylinder is added, a unitary crank shaft is provided to connect the cylinders together. In the adding of compressing cylinders the manifold tow the cylinders is also changed.

Thus the compressor may be enlarged by simply adding more cylinders, changing the connecting condenser manifold and the crank shaft.

Each of the cylinders is provided with end plates for the crank shafts and each cylinder and crank shaft unit is made so that they will interfit and may be readily bolted together. The base upon which the cylinders may be mounted may also be enlarged to accommodate the number of compressor cylinders. If a large number of cylinders are added it may be necessary to change the electric driving motor or the power for driving the compressor units.

A feature resides in a cooling manifold having means for cooling the refrigerant directly as it comes from the compressing units, the manifold having a rapid cooling means contained therein and associated therewith, so that the refrigerant is materially cooled before it passes through the cooling radiator or into the storage compart- 5 ment, thus materially increasing the efllciency of my compressor device.

Heretofore the refrigerant passed from the compressor units to the cooling radiator, or other storage compartment, where it was cooled and condensed, and the manifold did not have a condensing means. With my cooling manifold, the condensing starts to take place as soon as the refrigerant passes from the compressor units. This is very desirable, and I have found the same to be more effective than with the old method which was used heretofore.

The various features and advantages of the new and novel structure herein set forth, will be more fully defined in the description and further objects and advantages of my sectional refrigerant compressor and cooling manifold.

In the drawings:

Figure 1 is a perspective view, showing a form of my sectional refrigerant compressor and cooling manifold as it would appear in use, with the associated parts thereof.

Figure 2 atically illustrates the operation of my sectional refrigerant compressor and cooling manifold to showthe manner of operation.

Figure 3 is a section through one of my sectional refrigerant compressor and cooling manifold devices, where three compressor units are connected together.

Figure 4 diagrammatically illustrates a single compressor unit.

Figure 5 diagrammatically illustrates a double compressor unit;

Figure 6 diagrammatically illustrates four compressor units connected together;

Figure 7 illustrates a crank shaft for a single compressor unit.

Figure 8 is an end view of Figure 7.

Figure 9' illustrates a crank shaft for a twin compressor unit.

Figure 10 is an end view of Figure 9.

Figure 11 illustrates a crank shaft for three compressor units.

Figure 12 is an end view of Figure 11.

Figure 13 illustrates a crank shaft for four compressor units.

Fi ure 14 is an end view of Figure 13.

My sectional refrigerant compressor and coolng manifold device A includes the compressor units B which are connected together by the cooling manifold C for the refrigerant as it leaves the compressor units B, and before it passes into the storage tank D. The device also includes the electric motor E for driving the compressor units, together with the supporting base F and the other associated parts thereof.

I have diagrammatically illustrated my sectional refrigerant compressor and cooling manifold device A in Figure 2. This shows the manner in which the compressor imits are connected together by the cooling manifold C and through the connection of the crank case portions I! of each of the units B.

The cylinders ll of each of the units B may be provided with cooling fins i2 and each piston l3 of the units B is provided with spring. valves l4 which permit the refrigerant to be carried from the crank case chamber II through the pistons 13 and into the compressor chamber is of the respective cylinders II. The heads ll of the cylinders II are also provided with spring check valves is which permit the compressed refrigerant to be carried through the connecting port is into the chamber 20 of the cooling manifold C.

The cooling manifold C connects each of the units B through the respective ports I. so that if there are three compressor units-B, as illustrated in Figure 8, they are' each connected, as illustrated, to the cooling manifold C. Extendin through the manifold C I provide a water tube 2! which may be formed with fins or ribs 22 projecting from the outer surface thereof into the compartment 20. As the refrigerant is carried into the manifold C it is adapted to pass over the water cooling tube 2i through which cold water is adapted to continuously pass. entering at the end 23 and passing out through the other end 24. The outer surface of the manifold C may be formed with cooling ribs 22, thusproviding a very eillcient cooling means for the refrigerant closely adjacent the compressor units B.

The crankcase of each unit B is machined to interflt at 26 with a similar crank case, and end plates 21 and 22 are provided which are machined to fit the respective ends of the crank cases of. the units B. Thus any number of units B may be readily connected together.

Whenever the compressor device A is changed to include more compressor units B, it is necessary to change the crank shaft 22 according to the number of cylinders ll added to the compressor device A. I have illustrated in the respective Figures '7 to 14, inclusive, the diflerent crank shafts from where one to four cylinders or compressor units B are used, and I have also illustrated diagrammatically the general outline of my compressor device A -where one, two and four cylinders are used, in Figures 4, 5, and 6,-

respectively. These show the simple manner in which I provide a sectional refrigerant compressor and cooling manifold device adapted for use to cool the refrigerant which is used in the refrigerating coil or coils. In the ditic showing in Figure 2, the refrigerant passes from the refrigerating coil G tothe chamber I! of the unit B and is carried up through the respective pistons l2 and compressed in the chamber l5, passing directly after being compressed into the cooling manifold C. From the cooling manifold the refrigerant passes out through the opening 29 and through the tube 22, into the storage tank 3 l where it is cooled by a cooling coil 22, through compressor.

water pipe 2| may be connected directly from asource of cold water without coming through the coil 22 of the tank 8|. *From the storage tank 3! the refrigerant passes back through the expansion valve 2; to the refrigerating coil or coils G, thus completing the cycle of operation.

It will be apparent that a primary feature of my sectional refrigerant compressor resides in providing unitary compressor units B, each'of which is identical and which may be connected as illustrated in Figure 3, or in any suitable manner. Thus my refrigerant compressor may be sectionally expanded, adding as many sections as may be desired in the units B, at the same time connecting the same with the cooling manifold C.

It is also apparent that the cooling manifold C is of primary importance because it relieves the duty of the cooling medium either in. the water coil for cooling the refrigerant, or in the radiator, and owing to the fact that the manifold may be so closely associated with the cylinders of the units B, it is very efficient in its operation and performs an important function in the successful and efficient operation of my refrigerant This cooling manifold also makes it more practical and easy to provide a sectional refrigerant compressor.

My sectional refrigerant compressor and cool ing manifold device may be readily built up as described, and the end plates 21 and 2. moved to close the outer ends of any of the units 13, and it is only necessary to provide the proper sized manifold C, together with a supporting base of the sire desired, or adding tothe original base F, and thus it is possible in a simple and efdcient manner -to provide a larger refrigerant compressor device at any time. 'Heretofore refrigerant compressor devices have been built with a fixed limited capacity. If at any time refrigeration was needed the entire assembly or device A would have to be changed, whereas, in my device a motor E may be supplied which is large enough to drive several additional units B, if they are desired, through the V-belts 3| which operate over the pulley 28 to drive the crank shaft 22. Thus with a large enough motor, it is only necessary to change the crank shaft and add the number of units B desired, together with ,the desired size manifold C, and virtually all of the other assembly may be used to increase the capacity of my refrigerant compressor. This is a material saving to the purchaser. It also provides a more flexible means of installing devices of this character and with the advantage of my cooling manifold C, the refrigerant is. rapidly cooled, keeping the heads of the cylinders of the respective units comparatively cool and thus providing a very efficient device.

The eccentrics and the enlarged shaft portions are of the same size, so that the bearings and the eccentric straps may be made in one piece. It will be noted that the eccentrics are not positioned centrally between the enlarged portions. This construction enables the enlarged shaft portions and the eccentrics to be passed through the bearings and eccentric straps at different times. For example, in taking down the compressor illustrated in Figure 3, the cylinder at the right end of the compressor may be removed by removing the bolts connecting the right hand cylinder to the center cylinder, and by removing the manifold the cylinder may be slidably disengaged, the eccentric sliding out of engagement from the eccentric strap therein. The bearing between the center and right hand cylinders may next be removed and slidably disengaged over the eccentric for the right hand cylinder. The center cylinder may be removed in a manner similar to the right hand cylinder. Each part is unitary, and may be removed in a very simple manner. Ii desired, the bearing portion does not have to be removed from the center cylinder, as the eccentricstrap will be disengaged from the eccentric simultaneously with the disengagement of the hearing from the enlarged shaft portion. By moving the cylinder with respect to the shaft the bearing portion may be slipped over the ec- 1. A refrigerant compressor including, the

' gageable in said bearings and eccentrics on said shaft of substantially equal size to said enlarged portions to permit said eccentric strapsand bearings to be made in one piece.

2. In a refrigerant compressor, the combination of unitary cylinder and crank case portions,-

end crank case plates for closing the crank case portions, one piece eccentric straps, a piston in each cylinder connected to an eccentric strap, means for attaching one or more similar unitary cylinder and crank case portions by removing one of the end plates and shifting it to the last attached crank case portion, one piece bearings between said portions, a crank shaft for all of the cylinders, enlarged portions on said shaft engageable in said bearings, and eccentrics on said shaft equal in size with said enlarged portions.

EDWARD J. sans'ran. 

